/**
 * Copyright by e-shion.net
 */
package net.xfok.ui.animation;

import net.xfok.ui.ImageUtil;
import net.xfok.ui.R;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Shader.TileMode;
import android.os.Bundle;
import android.widget.ImageView;

/**
 * @author 2010-12-3 Howard
 * 
 */
public class ReflectedImage extends Activity {
	private static final String TAG = "ReflectedImage";
	private ImageView img1, img2;
	private Bitmap bmp1, bmp2;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.reflected_image);
		img1 = (ImageView) findViewById(R.id.image1);
		img2 = (ImageView) findViewById(R.id.image2);
		bmp1 = BitmapFactory.decodeResource(getResources(), R.drawable.apple);
		setViews();
	}

	private void setViews() {
		bmp1 = ImageUtil.getRoundedCornerBitmap(bmp1, 20.0f);
		bmp2 = ImageUtil.createReflectionImageWithOrigin(bmp1);
		img1.setImageBitmap(bmp1);
		img2.setImageBitmap(bmp2);
		
	}

	public static Bitmap createReflectedImage(Bitmap originalImage) {
		// The gap we want between the reflection and the original image
		final int reflectionGap = 4;

		int width = originalImage.getWidth();
		int height = originalImage.getHeight();

		// This will not scale but will flip on the Y axis
		Matrix matrix = new Matrix();
		matrix.preScale(1, -1);

		// Create a Bitmap with the flip matrix applied to it.
		// We only want the bottom half of the image
		Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0,
				height / 2, width, height / 2, matrix, false);

		// Create a new bitmap with same width but taller to fit reflection
		Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
				(height + height / 2), Config.ARGB_8888);

		// Create a new Canvas with the bitmap that's big enough for
		// the image plus gap plus reflection
		Canvas canvas = new Canvas(bitmapWithReflection);
		// Draw in the original image
		canvas.drawBitmap(originalImage, 0, 0, null);
		// Draw in the gap
		Paint defaultPaint = new Paint();
		canvas.drawRect(0, height, width, height + reflectionGap, defaultPaint);
		// Draw in the reflection
		canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);

		// Create a shader that is a linear gradient that covers the reflection
		Paint paint = new Paint();
		LinearGradient shader = new LinearGradient(0,
				originalImage.getHeight(), 0, bitmapWithReflection.getHeight()
						+ reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);
		// Set the paint to use this shader (linear gradient)
		paint.setShader(shader);
		// Set the Transfer mode to be porter duff and destination in
		paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
		// Draw a rectangle using the paint with our linear gradient
		canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()
				+ reflectionGap, paint);

		return bitmapWithReflection;
	}
}
